DLAND 3200 DPI 7 Buttons LED Optical USB Wired Gaming Mouse Game Mice for Pro Gamer with Free Dland Large Mousepad Gaming Mouse Mice Pad Mat Tracking systems: Optical. Ergonomically designed, long-term use without fatigue. Built-weight iron, feel comfortable, mobile and stability. Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS...or latest. Dimension of mouse pad: 300x230x3 mm (L x W x H).